Civil Engineering

Basic Interview questions for Civil Design Engineer 01. What is the Minimum reinforcement percentage for a column?  Answer: The minimum reinforcement percentage is 0.8% of the cross-sectional area of a column or A st = 0.85db / f y. 02. What is the Maximum reinforcement percentage for a column?  Answer:  The minimum reinforcement percentage is 6.0% of the cross-sectional area of a column or 0.04 bD. 03. How do we determine the effective length of a column? Answer: The effective length of a column is expressed as L eff = k x L                 Where k stands for effective length ratio.                             L stands for unsupported length or clear height of the column. 04. What is the Effective length ratio of a column? Answer: The effective length ratio is basically a constant depending upon the degree of rotational & translational restraints at the ends of the column. 05. Define Slenderness Limits of a column? Answer:  The Slenderness Li

Basic Interview questions for Civil Site Engineer 01. What does the M20 grade of concrete mean? Answer: 'M' stands for mix design & 20 stands for the average compressive strength at 28 days in N/ mm 2 . 02. What is the ratio for M10 M15 & M20 grade of concrete? Answer: The ratio is - M10 - 1:3:6                                     M15 - 1:2:4                                     M20 - 1:1.5:3 03. In the above answer what are the components of the ratio? Answer: The ratio stands for Binder (Cement): Fine aggregate: Coarse aggregates. 04. What does SCC stand for? Answer: SCC stands for Self-compacting / Self Consolidating Concrete. 05. In general, which component of concrete is responsible for cube / concrete failure? Answer: The binder material (cement mortar) is mainly responsible for concrete failure as the failure/ crushing strength of the Coarse aggregate is much higher. 06. Why is 10 mm coarse aggregate is used in concrete al

Estimation of Brickwork & AAC Blockwork  The file attached can determine the quantities of Cement, Sand required in typical brickwork including plaster on both faces of the structure. This excel can also be utilized to find the estimated quantities of AAC blockwork, where plaster needed is zero (0). It is also very flexible, with easy customization. Download this excel: Link: Estimation_Brickwork.xlxs

What is waterproof coating & membrane To prevent the entry of water through seepage or moisture damp inside an RCC structure waterproofing is used. Generally, after completion of construction work of a structure waterproofing work is carried out. The process of waterproofing can be carried out in many ways. However, it can be broadly classified as:   Coating – By the use of Polyurea coating as a waterproofing membrane.   Membrane - By using the waterproofing membrane. Waterproofing coat (PU): Surface Preparation – The surface is inspected for any structural defects such as cracks, undulations, and honeycombs if found it shall be rectified before coating. Right angle junctions between slab & perpendicular wall/column shall be treated by coving the junction (75mm x 75mm generally) & filling it with a polymer-modified mortar. The surface shall be free from dust, loose materials, cracks & in saturated surface dry (SSD) condition before the application of a